gordon



(No Model.)

2 Sheets-Sheet 1.

T. GORDON.

LAMP.

Patented June 3, 1890.

qxwcmowo wuqmkoz Tizamaa. Gowdom L 5 7r/wlhml (No Model.) 4 2 Sheets-Sheet 2.

. T. GORDON.

LAMP.

No. 429,440. Patented June 3, 1 890.

wi cweoow mnmtoz I wawwkm f,,',,,%f [1. S. W/H/ZQZ V I atmnug THE Noam: Finns 00., mum-mum, msnmzrmu, n. c.

UNITED STATES PATENT OFFICEe THOMAS GORDON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE SIEMENS LUNGREN COMPANY, OF PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 429,440, dated June 3, 1890. Application filed September 12, 1887. Serial No.{,249,511. (No model.)

To all. whom it may concern.-

Be it known that I, THOMAS GORDON, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain I new and useful Improvements in Lamps, of

which the following is a description.

My present improvement consists in surrounding the burner with an approximately [0 air-tight chamber, surrounding the outlet end of the chimney of the burner, with a chamber having inlet and outlet ports so arranged as to allow of the waste products "escaping therefrom and the air-supply entering thereto without becoming mixed, connecting the above-mentioned chambers with vertical passages (one or more) so arranged with reference to the waste-product flue as to be insulated from the heat of the escaping products, and thereby maintain a difference in temperature, to insure the downward circulation of air sufficient to feed the flame.

Referring to the drawings, Figure 1 represents a vertical section on line C D of Fig. 2. 2 5 Fig. Zrepresents a horizontal section through line A B of Fig. 1.

In the constructionshown in Fig. 1 A is a regenerative gas-burner.

B is an approximately air-tight chamber. .0 Surrounding the burner O is a flue for the escape of the waste products from the burner. D is a chamber surrounding the upper end of the flue O. This chamber has an outletpassage D, located preferably directly over 5 the upper end of flue C, but in no way connected thereto. The chamber D is also provided with passages or inlet-ports D for the admission of air. Descending from the chamber D, and forming passages leading therefrom to the chamber B, are the tubes E E, which may be constructed of non-conducting material, and through which air descends to support combustion in the burner A.

Surrounding the flue O is arranged flue F, 5 open top and bottom and communicating with both chambers, thus forming an annular passage through which air may circulate to prevent overheating of the chamber 13 or 'the tubes E.

The flue C may be constructed of non-conducting material, if desired, and for certain sizes of burners this may be preferable.

When the burner is in operation, the waste products pass up througha flue O,.producing a draft and causing the cold air to circulate downward throughflues or passages E E, and thence, as shown by the arrows in Fig. 1, through the regenerative chambers of the burner. The object of this form of construction is to overcome the principal difficulty experienced with lamps in which the outlet and inlet are at opposite ends of the fixture' viz., the reversal of the draft in the escapeflue caused by gusts of wind sweeping past the inlet. In this form the inlet and outlet are both at the upper end, and as closetegether as practicable. Both being connected with the same chamber, the suction on both inlet and outlet is balanced. To prevent the circulation from starting in the wrong direction and to facilitate the lighting of the burn .er, a tube G is introduced at the base of the tubes E, or said tubes E Emay extend downward to a point below the level of the inlet H of the regenerative chambers of the burner.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is 1 1. In a regenerative gas-lamp, the combination of an escape-flue for the products of combustion, an inverted annular regenerative gas-burner, an approximately air-tight chamber containing the burner, a chamber surrounding the upper end of the escape-flue and connected therewith, having outlet-ports for the products of combustion'and inletports for air, and tubes connecting the chamber surrounding the upper end of the escapeflue with the approximately air-tight chamber surrounding the burner, the said tubes 0 terminating within the last-named chamber at a point below the level of the entrance through which the air enters the burner, as and for the purposes described,

2. In a regenerative gas-lamp, the combina- 5 tion of an escape-flue for the products of combustion, an inverted annular regenerative burner concentric thereto, and above the lower end thereof an approximately air-tight chamber surrounding the said burner and municating at its upper end with the chamber surrounding the upper end of the escapefiue and at its lower end with the approximately air-tight chamber surrounding the burner, as and for the purposes described.

In testimony of which I aflix my signature in the presence of two Witnesses.

TI-IOS. GORDON. Witnesses:

JOHN A. WIEDERsHEIM, JAMES F. KELLY. 

